Speaker
Description
I will summarise the key science goals for the ASKAP HI All Sky Survey (WALLABY), aiming to survey three quarters of the sky (Dec < +30 deg) out to a redshift of z = 0.26. The WALLABY resolution will be ~30 arcsec and 4 km/s. ASKAP has now started operating with the full array of 36 x 12-m antennas, each equipped with a wide-field Phased Array Feed (PAF). I will present the latest HI results, including highlights from our five WALLABY Early Science fields targeting nearby galaxy groups and clusters. The huge field of view (30 square degrees), achieved by forming 36 beams using Checkerboard PAFs, makes ASKAP a fast 21-cm survey machine. All data products, obtained with the custom-build ASKAPsoft pipeline, will be publicly available in a dedicated science archive. Our WALLABY science goals, ranging from HI studies of the Local Group to scaling relations and cosmology, are much aided by sophisticated simulations and complementary multi-wavelength surveys. Essential to the success of WALLABY is our flexible 3D source finding application (SoFiA) as demonstrated in our series of WALLABY Early Science papers.
| Wish list question? | 12. How can a z ~ 0 HI survey usefully inform the analysis of a z ~ 1 HI survey – and perhaps vice versa? |
|---|